SmallRig Cheese Bar with 1/4 Inch and 3/8 Inch Screw Hole 1091 is equipped with industry standard 1/4"-20 and 3/8"-16 threaded holes, which make it possible to mount on any 1/4"-20 and 3/8"-16 accessories. You can also mount it onto Red camera or Red Rig because it comes with the RED screw spacing .